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1.
Sensors (Basel) ; 23(2)2023 Jan 12.
Artigo em Inglês | MEDLINE | ID: mdl-36679674

RESUMO

Image processing on smartphones, which are resource-limited devices, is challenging. Panorama generation on modern mobile phones is a requirement of most mobile phone users. This paper presents an automatic sequential image stitching algorithm with high-resolution panorama generation and addresses the issue of stitching failure on smartphone devices. A robust method is used to automatically control the events involved in panorama generation from image capture to image stitching on Android operating systems. The image frames are taken in a firm spatial interval using the orientation sensor included in smartphone devices. The features-based stitching algorithm is used for panorama generation, with a novel modification to address the issue of stitching failure (inability to find local features causes this issue) when performing sequential stitching over mobile devices. We also address the issue of distortion in sequential stitching. Ultimately, in this study, we built an Android application that can construct a high-resolution panorama sequentially with automatic frame capture based on an orientation sensor and device rotation. We present a novel research methodology (called "Sense-Panorama") for panorama construction along with a development guide for smartphone developers. Based on our experiments, performed by Samsung Galaxy SM-N960N, which carries system on chip (SoC) as Qualcomm Snapdragon 845 and a CPU of 4 × 2.8 GHz Kyro 385, our method can generate a high-resolution panorama. Compared to the existing methods, the results show improvement in visual quality for both subjective and objective evaluation.


Assuntos
Telefone Celular , Software , Algoritmos , Processamento de Imagem Assistida por Computador/métodos , Smartphone
2.
Artigo em Inglês | MEDLINE | ID: mdl-36673953

RESUMO

Internet-related disorders are on the rise and increasing cell phone social media use may be one of the reasons for these disorders. To better understand internet-related disorders, we aim to explore the psychological and social aspects of cell phone social media behaviors. We hypothesized that, according to humanistic theories of positive functioning, cell phone social media connectedness to self (engagement, interest, pleasure, sense of enjoyment, meaningfulness, purposefulness, optimism, acceptance, and feeling accomplished) would relate positively to psychological well-being of undergraduate students. We also hypothesized that, according to Maslow's hierarchy of needs, cell phone social media connectedness to others (affiliation, feeling rewarded, being liked by others, and contributions to the well-being of others) would relate positively to the psychological well-being of undergraduate students. During the fall of 2019, 523 (75.4% female) undergraduate students from a large public university participated in this study by completing validated quantitative surveys on their cell phone use and psychological well-being. Spearman's rho and ordinal logistics were implemented to analyze the findings. Correlational data showed that cell phone social media connectedness to self and cell phone social media connectedness to others were positively associated with the psychological well-being of undergraduate students. Ordinal logistics showed higher odds of psychological well-being occurring with cell phone social media connectedness to self and cell phone social media connectedness to others. Cell phone social media connectedness to self significantly predicted psychological well-being with the medium effect, whereas cell phone social media connectedness to others was not a significant predictor of the psychological well-being of undergraduate students. An increase in cell phone social media connectedness to self and an increase in cell phone social media connectedness to others of undergraduate students helped them improve their psychological well-being. Cell phone social media connectedness to self significantly predicted but cell phone social media connectedness to others did not predict the psychological well-being of undergraduate students, which may have implications for the research pertaining to behavioral addiction and may help better understand internet-related disorders.


Assuntos
Uso do Telefone Celular , Telefone Celular , Mídias Sociais , Humanos , Feminino , Adulto Jovem , Masculino , Estudantes/psicologia
3.
Artigo em Inglês | MEDLINE | ID: mdl-36674203

RESUMO

Being the target of negative school gossip, a form of relational aggression, has been shown to be associated with psychological and behavioral problems in youth adolescents. Based on the experience avoidance model, this study tested the association between negative school gossip and youth adolescents' mobile phone addiction, and the serial mediation roles of anxiety and experience avoidance in this relationship. Junior high school students (N = 837; ages 12-15; 50% girls) completed the Negative School Gossip Scale, Anxiety Scale, Acceptance and Action Questionnaire (AAQ-II), and Mobile Phone Addiction Scale in their classrooms. The results of regression-based analyses showed that after controlling for age and gender, (1) negative school gossip was significantly associated with mobile phone addiction; (2) anxiety and experience avoidance each significantly mediated this association; (3) anxiety and experience avoidance serially mediated this association. The results support the experience avoidance model and highlight emotional factors as an internal mechanism by which negative school gossip is associated with youth adolescents' mobile phone addiction. The results also have implications for preventing and reducing youth adolescents' mobile phone addiction.


Assuntos
Comportamento Aditivo , Telefone Celular , Feminino , Humanos , Adolescente , Criança , Masculino , Comportamento Aditivo/epidemiologia , Comportamento Aditivo/psicologia , Ansiedade/epidemiologia , Ansiedade/psicologia , Emoções , Dependência de Tecnologia
4.
Artigo em Inglês | MEDLINE | ID: mdl-36674209

RESUMO

Globally, most young people living with mental health conditions lack access to mental health care but have access to a mobile device. The growing access to mobile devices in South Africa has the potential to increase access to mental health care services through digital platforms. However, uptake of digital mental health interventions may be hampered by several factors, such as privacy, confidentiality, informed consent, and affordability. This study identified the prospects and challenges of implementing a mobile phone-based mental health intervention for young people in Ingwavuma area. Data were collected from 93 young people in three villages purposefully selected in Ingwavuma area. Participants included in the study were aged 16-24. Data were collected through a questionnaire. Thematic and descriptive analysis was performed on the qualitative and quantitative data, respectively. Mental health education was low, with only 22% of participants having received prior education on mental health. About 50% of the participants had come across a mental health app, but none of them had used any of these apps; 87% of participants had Internet access; 60% preferred to use social media to contact a health worker; and 92% suggested that use of digital apps would improve mental health literacy among young people. Barriers to access of digital mental health interventions were identified as the high cost of data, restrictive religious beliefs, limited privacy, lack of native languages on most digital platforms, low digital literacy, and complicated user interface. In uMkhanyakude, uptake of digital mental health apps among the young people was low. We recommend that, developers create context-specific digital applications catered for young people from different cultural backgrounds. Socio-economic issues such as affordability also need to be addressed in developing these tools.


Assuntos
Telefone Celular , Transtornos Mentais , Serviços de Saúde Mental , Humanos , Adolescente , Saúde Mental , África do Sul
5.
Sensors (Basel) ; 23(2)2023 Jan 12.
Artigo em Inglês | MEDLINE | ID: mdl-36679703

RESUMO

Due to the rapid growth in the use of smartphones, the digital traces (e.g., mobile phone data, call detail records) left by the use of these devices have been widely employed to assess and predict human communication behaviors and mobility patterns in various disciplines and domains, such as urban sensing, epidemiology, public transportation, data protection, and criminology. These digital traces provide significant spatiotemporal (geospatial and time-related) data, revealing people's mobility patterns as well as communication (incoming and outgoing calls) data, revealing people's social networks and interactions. Thus, service providers collect smartphone data by recording the details of every user activity or interaction (e.g., making a phone call, sending a text message, or accessing the internet) done using a smartphone and storing these details on their databases. This paper surveys different methods and approaches for assessing and predicting human communication behaviors and mobility patterns from mobile phone data and differentiates them in terms of their strengths and weaknesses. It also gives information about spatial, temporal, and call characteristics that have been extracted from mobile phone data and used to model how people communicate and move. We survey mobile phone data research published between 2013 and 2021 from eight main databases, namely, the ACM Digital Library, IEEE Xplore, MDPI, SAGE, Science Direct, Scopus, SpringerLink, and Web of Science. Based on our inclusion and exclusion criteria, 148 studies were selected.


Assuntos
Telefone Celular , Aplicativos Móveis , Envio de Mensagens de Texto , Humanos , Smartphone , Inquéritos e Questionários , Comunicação
6.
Rev Esc Enferm USP ; 56: e20220330, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36705551

RESUMO

OBJECTIVE: To identify information needs of patients with coronary artery disease and develop and validate the content of educational messages for mobile phones for these patients. METHOD: The study was carried out in three phases: 1) Identification of information needs in relation to coronary artery disease of patients hospitalized for an acute coronary event; 2) Development of templates containing text and pictures about the disease and treatment; 3) Content validity analysis of template evidence through the assessment of 10 experts. Templates were considered validated when the Content Validity Ratio (CVR) was equal to or greater than 0.80. RESULTS: A total of 67 patients were included, and all the information that emerged about the disease was classified as important to very important. Thirty templates were developed (heart function, recommendations on nutrition and exercise, treatments and medications, and clinical signs related to the disease and risk factor control), and the CVR obtained was greater than 0.80. CONCLUSION: All information needs were categorized by patients as important or very important. The templates were developed and validated considering content and design.


Assuntos
Telefone Celular , Doença da Artéria Coronariana , Envio de Mensagens de Texto , Humanos , Doença da Artéria Coronariana/prevenção & controle , Prevenção Secundária , Fatores de Risco
7.
Lancet Digit Health ; 5(2): e93-e101, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36707190

RESUMO

Substantial opportunities for global health intelligence and research arise from the combined and optimised use of secondary data within data ecosystems. Secondary data are information being used for purposes other than those intended when they were collected. These data can be gathered from sources on the verge of widespread use such as the internet, wearables, mobile phone apps, electronic health records, or genome sequencing. To utilise their full potential, we offer guidance by outlining available sources and approaches for the processing of secondary data. Furthermore, in addition to indicators for the regulatory and ethical evaluation of strategies for the best use of secondary data, we also propose criteria for assessing reusability. This overview supports more precise and effective policy decision making leading to earlier detection and better prevention of emerging health threats than is currently the case.


Assuntos
Telefone Celular , Aplicativos Móveis , Ecossistema , Saúde Global , Internet
8.
PLoS One ; 18(1): e0279373, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36689419

RESUMO

BACKGROUND: Persons living in refugee settlements in sub-Saharan Africa may be at increased risk for COVID-19 and experience barriers to accessing COVID-19 information. We aimed to evaluate the implementation of "Dial-COVID" a multi-lingual, toll free, telephone platform that uses interactive voice response (IVR) to track COVID-19 symptoms/exposure and disseminate COVID-19 health information in refugee settlements in Uganda. We hypothesized that IVR could provide an alternative way to screen for COVID-19 and communicate public health information to humanitarian populations when physical access and testing capacity were limited. METHODS: The Dial-COVID IVR platform was created in ten languages and advertised by community health workers in refugee settlements for participants to call into toll free. In a recorded IVR symptom survey, participants were screened for COVID-19 symptoms/exposures and based on their responses, received tailored public health messages about COVID-19 risk mitigation in accordance with Uganda Ministry of Health guidelines. Here we report the challenges and lessons learned implementing this research during the pandemic. RESULTS: Between February 2021 and March 2022, 15,465 calls were received by the Dial-COVID platform from all 31 refugee settlements in Uganda through which 6,913 symptom surveys were completed and 10,411 public health messages were disseminated in all study languages. Uptake of Dial-COVID fluctuated with the national COVID-19 caseload and was impacted by phone ownership and connectivity in refugee settlements. Intensified advertising efforts promoted Dial-COVID uptake. Flexibility to adapt IVR messages was contingent on translation capacity. CONCLUSION: Refugees living in refugee settlements across Uganda accessed Dial-COVID to share and obtain COVID-19 information suggesting that IVR holds potential for rapid information dissemination and screening of humanitarian populations during future infectious disease outbreaks and may be a valuable tool for routine public health programs. IVR adaptation flexibility and reach are influenced by language constraints and by contextual factors related to platform access. REGISTRATION DETAILS: World Pandemic Research Network- 490652.


Assuntos
COVID-19 , Telefone Celular , Refugiados , Humanos , Uganda , Tecnologia , Disseminação de Informação
9.
BMC Endocr Disord ; 23(1): 18, 2023 Jan 19.
Artigo em Inglês | MEDLINE | ID: mdl-36658577

RESUMO

BACKGROUND: Globally, type 2 diabetes has become increasing. As little is known about the effect of educational intervention on this population, this systematic review and meta-analysis evaluated the effectiveness of mobile phone text message reminders versus usual care to improve medication adherence among type 2 diabetes mellitus patients. METHODS: PubMed, Google Scholar, Cochrane Library, Scopus, and African Journals Online, were searched. A random-effects model was employed to estimate combined effect sizes. Subgroup analyses were employed to investigate possible sources of heterogeneity between studies. The overall certainty of the evidence was evaluated using the Grading of Recommendations Assessment, Development, and Evaluation approach. RESULTS: A total of 9 trials with 1,121 participants were included in the review. The pooled estimated impact of mobile phone text message reminders on medication adherence was (SMD: 0.36; 95%CI; 0.14, 0.59) compared to usual care groups among patients with type 2 diabetes mellitus. In addition, subgroup analyses revealed greater medication adherence levels in those studies with intervention durations of more than six months and with self-report/refill adherence scale measurement (SMD: 0.21; 95%CI: 0.02, 0.40) and (SMD: 0.45; 95%CI: 0.22, 0.68), respectively. CONCLUSION: Mobile phone text messages can potentially lead to improved medication adherence levels in patients with Type 2 diabetes despite heterogeneity across the studies. Therefore, mobile phone text messaging when delivered in addition to usual care, have the potential to produce significant improvements in medication adherence.


Assuntos
Telefone Celular , Diabetes Mellitus Tipo 2 , Envio de Mensagens de Texto , Humanos , Adulto , Diabetes Mellitus Tipo 2/tratamento farmacológico , Sistemas de Alerta , Ensaios Clínicos Controlados Aleatórios como Assunto , Adesão à Medicação
10.
Cad Saude Publica ; 38(12): e00093422, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36651419

RESUMO

This study aimed to investigate the relationship between sociodemographic characteristics, depressive symptomatology, mobile phone ownership, and different uses of WhatsApp among older adults enrolled in primary care clinics in Guarulhos, São Paulo State, Brazil. This is a secondary data analysis, using data collected in the screening of participants to be included in the PROACTIVE cluster randomized trial. Individuals aged ≥ 60 years, registered in primary care clinics in Guarulhos, were assessed for sociodemographic characteristics, depressive symptoms according to the PHQ-9, mobile phone ownership, and use of WhatsApp. We performed multiple logistic regression models to investigate characteristics of the potential users of digital interventions. Of 3,356 older adults screened for depression, 45.7% said they use WhatsApp to receive/send messages. In the subsample that presented depressive symptomatology (n = 1,020), 41.9% stated using WhatsApp. Younger older adults and those with better socioeconomic status used more WhatsApp and were more likely to own a mobile phone. Participants with higher levels of symptoms of depression were less likely to use WhatsApp. Gender, age, schooling level, income, and depressive symptomatology are variables associated with the possession of a cell phone and with the use of WhatsApp by the older adults of the sample. These findings can help to implement digital health programs better suited to disadvantaged populations in Brazil and other low- and middle-income countries through mental telehealth interventions using WhatsApp and mobile health services to the older people.


Assuntos
Telefone Celular , Telemedicina , Humanos , Idoso , Depressão/diagnóstico , Depressão/epidemiologia , Brasil/epidemiologia , Classe Social
11.
BMC Womens Health ; 23(1): 22, 2023 Jan 17.
Artigo em Inglês | MEDLINE | ID: mdl-36650480

RESUMO

BACKGROUND: Infertility has been considered as a critical health problem for couples and society. Given the worldwide exponential rise of infertility, mobile phone-based applications are drastic ways to deliver nutrition educational content to women with infertility. The present study aimed to prepare the required educational content for designing a mobile phone-based nutrition educational application for women with infertility. METHODS: Educational contents were initially determined based on the literature review and library studies. As a result, a researcher-made questionnaire was designed containing 28 items in six dimensions. To ensure about the questionnaire's validity, a panel of experts (15 nutritionists and 5 infertility specialists) was asked to review the items, make revisions (if necessary), and confirm the final contents. The questionnaire reliability was also corroborated using the KR-20 coefficient (0.89). RESULTS: While the amount of consumed calories per meal and between meals were not significantly effective on fertility, factors such as main definitions, disease and treatment instructions, personal activities and habits, and menstruation were deemed necessary by the respondents. Participants also suggested adding sections entailing introductions to different types of diets, users' suggestions and opinions, and of the address and contact information of senior nutrition centers to the questionnaire. CONCLUSIONS: Followed by obtaining the required valid and reliable contents, a mobile phone- based nutrition education application can be designed to improve the patients' knowledge and facilitate their treatment process.


Assuntos
Telefone Celular , Infertilidade Feminina , Humanos , Feminino , Infertilidade Feminina/terapia , Reprodutibilidade dos Testes , Inquéritos e Questionários , Ingestão de Energia
12.
Aten. prim. (Barc., Ed. impr.) ; 55(1): 102528-102528, Ene. 2023. tab, ilus
Artigo em Espanhol | IBECS | ID: ibc-214191

RESUMO

Objetivo: Diseñar y validar una escala de nomofobia en escolares de 9 a 13 años. Diseño: Estudio observacional descriptivo transversal. Emplazamiento: El estudio piloto se realizó en diciembre de 2019 con alumnos de un colegio de Ávila y otro de Madrid. El estudio de campo se realizó los meses de enero-marzo de 2020, recogiendo datos de 592 alumnos de un colegio de Badajoz y 3 de Ávila. Participantes: Alumnos de ambos sexos de 4.o, 5.o y 6.o de Educación Primaria y de 1.o y 2.o de Educación Secundaria Obligatoria, de colegios públicos y concertados. Método: El estudio se hizo en 2 fases. Fase I: elaboración de un cuestionario de 40 ítems con el asesoramiento de un panel de expertos. Este cuestionario se pasó, dentro del estudio piloto, a 312 niños matriculados en Educación Primaria o Educación Secundaria Obligatoria. Tras analizar los resultados, se modificó la escala de 40 ítems para mejorar la comprensión de los escolares y se realizó un estudio de campo con 592 participantes. Fase II: consistió en un análisis factorial exploratorio realizado por el método de componentes principales que proporcionó la distribución de los ítems en 7 componentes. Tras el análisis factorial confirmatorio se definió la escala definitiva de 32 ítems. Resultados: Se demostró que esta escala produce puntuaciones válidas y confiables. Conclusiones: La validación de esta escala será útil para identificar a niños con riesgo de nomofobia, permitiendo a educadores, padres y profesionales de la salud detectarla precozmente para prevenir un uso patológico del teléfono móvil.(AU)


Objective.To design and validate a nomophobia scale in childre: aged 9–13 years. Design: Cross-sectional descriptive observational study. Site: The pilot study was carried out in December 2019 with students from a school in Ávila and another in Madrid. The field study was carried out during the months of January to March 2020, collecting data from 592 students from a school in Badajoz and 3 from Ávila. Participants: Students of both sexes from 4th, 5th and 6th of Primary Education and from 1st and 2nd of Compulsory Secondary Education, from public and private schools. Method: The study has been divided in 2 phases. Phase I: consisted of the preparation of a 40-item questionnaire with the advice of a panel of experts. This questionnaire was passed, within the pilot study, to 312 children enrolled in Primary Education or Compulsory Secondary Education. After analyzing the results, the 40-item scale was modified to improve the understanding of the schoolchildren and a field study was carried out with 592 participants. Phase II: consisted of an exploratory factorial analysis carried out using the principal components method, which provided the distribution of the items in 7 components. After the confirmatory factorial analysis, the final 32-item scale was defined. Results: This scale was shown to produce valid and reliable scores. Conclusions: The validation of this scale will be useful to identify children at risk of nomophobia, allowing educators, parents and health professionals to detect this phenomenon early in order to prevent pathological smartphone use.(AU)


Assuntos
Humanos , Masculino , Feminino , Criança , Telefone Celular , Medo , Estudantes , Ensino Fundamental e Médio , Epidemiologia Descritiva , Estudos Transversais , Inquéritos e Questionários
13.
Accid Anal Prev ; 180: 106925, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36512902

RESUMO

Mobile phone distracted driving (MPDD) is one of the most significant and common factors in distraction-affected crashes. In previous studies, MPDD has been described as a self-selected behavior that affects driving performance, rather than a multidimensionally impacted behavior. In this study, the researchers hypothesized that external environmental features significantly impacted MPDD and tested this hypothesis by structural equation modeling (SEM). Three external latent variables (road, operation, and control factors) were measured at different times during weekdays in urban areas of Texas by integrating a large number of mobile phone sensor data and roadway inventory data. A structural model was developed to test the relationship between the latent variables and the rate of drivers involved in MPDD (MPDDR) on the roadway during different time periods. Finally, the data summary and model results revealed significant temporal effects. Standardized estimates from the SEM results revealed the positive impact of roads factors in the morning peak that broader shoulders, wider medians, and smaller curve radians were correlated with higher MPDDR in the morning peak hours; the negative impact of operation factors that higher average annual daily truck traffic (truck AADT) were associated with lower MPDDR significantly. And the impact of control factors on MPDDR is positive. In other words, the road segments with a large number of traffic signals in urban areas had a higher MPDDR than those without traffic signals. These findings could assist transportation and legislation agencies in the development of appropriate countermeasures or enforcement tactics and implement them effectively to reduce the occurrence of MPDD. In addition, this study provides a novel perspective close to the actual consideration of drivers about using mobile phones while driving, in the context of MPDD research, rather than comparing driver groups and vehicle performance.


Assuntos
Condução de Veículo , Telefone Celular , Direção Distraída , Humanos , Acidentes de Trânsito , Texas
15.
Accid Anal Prev ; 181: 106936, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36577243

RESUMO

While driver distraction remains an issue in modernized societies, technological advancements in data collection, storage and analysis provide the means for deeper insights of this complex phenomenon. In this research, factors influencing when driver distraction through mobile phone use occurs during naturalistic driving are investigated. Naturalistic data from a 6-stage, 230-driver experiment are exploited, in which drivers installed a non-intrusive driving recording application in their devices and conducted their trips normally across a 21-month timespan, coupled with corresponding questionnaire data. The various experiment stages involved providing progressively more behavioral feedback to drivers while continuing to record them. Subsequently, supervised Machine Learning XGBoost algorithms were employed to model the contributions of naturalistic driving and questionnaire features to the decision to engage mobile phone use. Mobile phone use percentages were heavily skewed towards zero, therefore imbalanced ML with a minority-oversampling approach in a binary format was employed. To increase the explainability offered by the algorithm, SHAP values were calculated for the informative features. Results indicate that the decision of drivers to use a mobile while driving is governed by a number of complex, non-linear relationships. Total trip distance is the most significant predictor variable by a wide margin, with mean SHAP values of 0.79 towards affecting the model decisions for the probability of mobile phone use of each driver. However, other variables influence the final predictions as well, such as the number of tickets in the last three years (m.SHAP = 0.30), declared mobile phone use (m.SHAP = 0.26), the amount and variety of provided feedback (m.SHAP = 0.17) (i.e. experiment phase number) and family member numbers (m.SHAP = 0.09) decrease the probability of using a mobile phone while driving. Conversely, increases in driver experience (m.SHAP = 0.22), driver age (m.SHAP = 0.11), engine capacity (m.SHAP = 0.11) and total kilometers driven annually (m.SHAP = 0.08) increase the probability of using a mobile phone in naturalistic driving conditions. SHAP dependency plots reveal non-linear effects present in almost all variables. Fuel consumption had a particularly strong non-linear effect, as higher values of this variable lead to both higher and lower probability of drivers using a mobile phone, deviating from the safer average. Legislation, campaigns and enforcement measures can be restructured to take advantage of gains margins in terms of understanding and predicting driver distraction behavior, as explored in the present study.


Assuntos
Condução de Veículo , Uso do Telefone Celular , Telefone Celular , Direção Distraída , Humanos , Acidentes de Trânsito , Aprendizado de Máquina
16.
Environ Res ; 216(Pt 1): 114429, 2023 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-36174753

RESUMO

The opportunities for exposure to radiofrequency electromagnetic fields (RF-EMF) among children are increasing. Children's exposure to RF-EMF in Japan was recorded using a personal exposure meter (ExpoM-RF), and factors associated with the exposure examined. A total of 101 children, aged 10-15 years old, participated in the prospective birth cohort "Hokkaido study". RF-EMF data were recorded in the 700 MHz-5.8 GHz frequency range for 3 days. The recorded data were summarized into six groups of frequency bands: downlink from mobile phone base stations (DL), uplink from mobile phones to a base station (UL), Wireless Local Area Network (LAN), terrestrial digital TV broadcasting (digital TV), 2.5 GHz and 3.5 GHz Time Division Duplex (TDD), 1.9 GHz TDD, and total (the summation of power density in all measured frequency bands). A questionnaire was used to document the internet environment (at home) and mobile phone usage. Personal RF-EMF exposure in Japanese children was lower than that reported in studies in Europe. The DL signals from mobile phone base stations were the most significant contributors to total exposure, while Wireless LAN and digital TV were only higher at home. The urban residence was consistently associated with increases in the four groups of frequency bands (DL, UL, digital TV, and TDD). TDD level has several associations with mobile phone usage (calls using mobile phones, video viewing, text message service, and online game). The association between inattention/hyperactivity subscale of the Strengths and Difficulties Questionnaire (SDQ) and higher Wireless LAN exposure at nighttime was also noted. Further studies with additional data will shed light on factors involved in RF-EMF exposure among Japanese children.


Assuntos
Telefone Celular , Saúde da Criança , Criança , Humanos , Adolescente , Japão , Estudos Prospectivos , Ondas de Rádio , Campos Eletromagnéticos/efeitos adversos , Inquéritos e Questionários , Exposição Ambiental
17.
Waste Manag ; 157: 290-300, 2023 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-36580884

RESUMO

Currently, China has the largest generation volume of waste mobile phones (WMPs), but the recycling rate is still negligible. How to improve the willingness to hand (WTH) over to formal recycling channels and willingness to pay (WTP) have become the most core problems in the e-waste recycling industry. As the important link between WMPs generation and collection, the residents' role and function are attracting more and more attention. Thus, this study is designed to identify the determinants of the residents' WTH and WTP for WMPs through the contingent valuation method (CVM). At the same time, it will explore the current existing gaps from the urban and rural residents. Especially, this study also considers Guiyu Town as one special rural region for understanding the differences with other regions. The results show that the respondents generally have the relatively lower knowledge and cognition on WMPs recycling. Only 9.4% respondents are satisfied with the current government's management of WMPs. Personal information leakage is an important reason for low WTH. The WTH of Guiyu, urban and rural respondents were 51.3%, 45.9% and 41.2%, respectively; while their WTP were 46.80%, 31.70% and 37.80%, respectively. Finally, it is estimated that their WTP values were 18.75 ($2.81), 16.14 ($2.42) and 15.85 ($2.38) RMB per unit, respectively. The demographic variables, cognition and attitude are important factors on all residents' WTH and WTP. Meanwhile, it is indicated that if owning higher WTH, the residents will trend to higher WTP. Especially, the WTH and WTP of Guiyu residents are higher than other residents.


Assuntos
Atitude , Telefone Celular , Reciclagem , Gerenciamento de Resíduos , China , Cidades , Inquéritos e Questionários , Gerenciamento de Resíduos/métodos , População Urbana , População Rural
18.
Environ Res ; 216(Pt 2): 114483, 2023 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-36209790

RESUMO

Personal exposimeters are currently used in studies assessing human exposure to electromagnetic fields. These devices are usually carried by an individual, but vehicles such as bicycle or car are also used. The aim of the present study was to propose a personal exposimeter attached to a drone to perform environmental radio-frequency measurements. Trials were carried out to determine whether: (i) the wireless communication between the remote controller and the drone affects the downlink mobile telephony bands by a cross-talk effect, and (ii) the structure of the drone alters the measurements of the exposimeter compared to when the meter is on a tripod. To apply this system to a real scenario, a 3D representation of the electric field in a building was obtained, and the attenuation due to the building of radiation from outside was estimated. Measurements of the electromagnetic field with this system will make it possible to monitor without risk the emissions of antennas in their close vicinity, and to validate propagation models experimentally.


Assuntos
Telefone Celular , Campos Eletromagnéticos , Humanos , Dispositivos Aéreos não Tripulados , Exposição Ambiental , Ondas de Rádio
19.
J Affect Disord ; 320: 381-389, 2023 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-36206877

RESUMO

BACKGROUND AND AIMS: Although previous studies have discussed the association between mobile phone use addiction (MPUA) and depressive symptoms in adolescents, studies on Chinese adolescents are limited, with no studies being reported on adolescents from ethnic minority areas within Yunnan. This study aimed to explore the mediating mechanism of insomnia in the association between MPUA and depressive symptoms among Yunnan college students. METHODS: A sample survey was conducted among 10,121 college students from four colleges in Yunnan province, China, from November to December 2021 via cluster sampling. Insomnia was assessed using the Insomnia Severity Index Scale, MPUA was assessed using the Self-Rating Questionnaire for Adolescent Problematic Mobile Phone Use, and depressive symptoms were assessed using the Patient Health Questionnaire-9 items. A generalized linear model was used to analyze the association between MPUA, insomnia, and depressive symptoms. The structural equation model was used to analyze the mediating effect of insomnia. RESULTS: The positive rates of depressive symptoms, MPUA, and insomnia were 39.2 %, 30.8 %, and 22.3 %, respectively. After adjusting for the demographic and confounding variables, MPUA (ß = 0.14, 95 % CI: 0.13-0.15, P < 0.01) and insomnia (ß = 0.44, 95 % CI: 0.43-0.46, P < 0.01) were associated with depressive symptoms (P < 0.05). The mediating effect of insomnia accounted for 34.7 % of the total effect in the mediating model of MPUA associated with depressive symptoms. CONCLUSION: Our findings suggest that insomnia partially mediates the association between MPUA and depressive symptoms among Yunnan college students.


Assuntos
Uso do Telefone Celular , Telefone Celular , Distúrbios do Início e da Manutenção do Sono , Humanos , Adolescente , Distúrbios do Início e da Manutenção do Sono/epidemiologia , Depressão/epidemiologia , China/epidemiologia , Minorias Étnicas e Raciais , Etnicidade , Grupos Minoritários
20.
Am J Trop Med Hyg ; 108(1): 41-43, 2023 01 11.
Artigo em Inglês | MEDLINE | ID: mdl-36509050

RESUMO

Schistosomiasis infections continue to impact African settings disproportionately, and there is an urgent need for novel tools to evaluate infection control and elimination strategies at the community level. Mobile phone microscopes are portable and semiautomated devices with multiple applications for screening neglected tropical diseases. In a community-based schistosomiasis screening program in Azaguié, Côte d'Ivoire, mobile phone microscopy demonstrated a sensitivity of 85.7% (95% CI: 69.7-95.2%) and specificity of 93.3% (95% CI: 87.7-96.9%) for Schistosoma haematobium identification compared with conventional light microscopy, and 95% sensitivity (95% CI: 74.1-99.8%) with egg concentrations of five or more per 10 mL of urine. Mobile phone microscopy is a promising tool for schistosomiasis control and elimination efforts.


Assuntos
Telefone Celular , Esquistossomose , Humanos , Animais , Schistosoma haematobium , Microscopia , Costa do Marfim/epidemiologia , Esquistossomose/diagnóstico
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